Engine Mechanical:
Complete engine overhaul, diagnosis, and repair
Engine Control System:
Diagnosis and repair of engine management systems
Fuel System:
Fuel delivery, injection, and control system service
Emission Control:
Service and diagnosis of emissions control components
Cooling System:
Radiator, fan, water pump, and thermostat service
Lubrication System:
Oil pump, filter, and lubrication circuit service
Ignition System:
Spark plugs, coils, distributors, and ignition timing service
Charging System:
Alternator, battery, and charging circuit diagnosis
Automatic Transmission:
Service, diagnosis, and repair of automatic gearboxes
Manual Transmission:
Service, diagnosis, and repair of manual gearboxes
Drivetrain:
Transfer case, driveshaft, and differential service
Suspension:
Front and rear suspension component service and alignment
Wheels Tires:
Wheel bearing service, tire pressure, and rotation guidance
Brake System:
Hydraulic, disc, and drum brake service and repair
Parking Brake:
Parking brake mechanism and cable service
Steering System:
Steering column, rack and pinion, and power steering service
Air Conditioning:
AC system diagnosis, recharge, and component repair
Restraint System:
Supplemental Restraint System (SRS) components and airbag service (cautionary)
Seat Belts:
Seat belt mechanism service and inspection
Engine Immobilizer:
Immobilizer system diagnosis and potential troubleshooting (model dependent)
Cruise Control:
Cruise control system diagnosis and repair
Wiper Washer:
Wiper motor, linkage, and washer system service
Door Locks:
Door lock mechanisms and central locking system service
Meter Audio Visual:
Instrument cluster, audio system, and basic AV component service
Horn:
Horn system diagnosis and repair
Glass Mirrors:
Windshield, glass, and mirror replacement/service
Instrument Panel:
Instrument cluster removal, repair, and diagnostics
Seats:
Seat adjustment mechanisms and interior trim service
Body Panels:
Hood, doors, and general body panel alignment and repair
Interior Exterior Trim:
Service and replacement of interior and exterior trim components
Electrical System:
Comprehensive electrical system diagnosis, troubleshooting, and component repair
Multiplex Can Communication:
Diagnosis of multiplex communication systems (where applicable to E23)
Maintenance Procedures:
Scheduled maintenance, fluid changes, filter replacements, inspections
Repair Procedures:
Step-by-step repair instructions for all covered systems
Diagnostic Procedures:
Troubleshooting guides, fault code interpretation (where applicable), and diagnostic techniques
Installation Replacement:
Instructions for replacing worn or damaged components
Adjustment Calibration:
Procedures for adjusting various systems and components
Depth Of Information:
Factory-level detail for technicians
Documentation Type:
Step-by-step instructions, diagrams, illustrations, wiring schematics
Rebuild Scope:
Covers complete vehicle repair and overhaul
Oil Change Interval:
Typically every 7,500 - 10,000 miles or annually (refer to manual for precise recommendation based on driving conditions)
Spark Plug Replacement:
Every 30,000 - 60,000 miles, depending on plug type (refer to manual)
Timing Belt Chain:
M30 engines use a timing chain, which requires periodic tensioner inspection, not replacement like a belt
Engine Oil Specification:
API SG or higher, SAE 15W-40 or 10W-40 (refer to manual for precise viscosity and BMW approval)
Coolant Specification:
Ethylene glycol-based coolant with corrosion inhibitors, typically a 50/50 mix with distilled water
Brake Fluid Specification:
DOT 3 or DOT 4 brake fluid (refer to manual for specific type)
Common Wear Items:
Cooling system components (hoses, radiator, water pump), fuel injectors, fuel pump, starter motor, ignition components, front suspension bushings
Electrical Gremlins:
Vintage BMWs can experience electrical issues due to age of wiring and components; manual is crucial for diagnosis